William r



Dec. 6,"197. y 1,651,702

W. R. HARDEN BAND SAWING MACHINE Filed Oct 15, 1923 3 Sheets-Sheet 2 INVENTOIL W/ l?. HFDE/V ATTORNEY.

Dec. 6, 1927. 1,651,702

W. R. HARDEN BAND SAWING MACHINE Filed oct. 15. 192s s sheets-sheet s f2s EFi- 5 I N VEN TOR.

'Figi l W/w/f/M/mE/v By W ` ATTORNEY.

Patented Dec. 6, 12927.;

l .entran stares ILIILIALVI iR. HAR-DEN, OF OAKLAND, CALIFORNIA.

BAND-SAWING MACHINE.

application mea octber 15, 1923. YSerial No. 668,566.

e This invention relates to band sawing machines. y l l IThe general object of the invention ,is

toy provide anl improved type Vofbajnd .saw-

ing machine wherein both a vertical and lateral adjustment of the 'saw maybe ef saw'and its driving parts vare mounted as aV unit upon atrack sothat they may be shifted laterally, and wherein the track itself is mounted 'for vertical adjustment.

A further object ofr the invention isjto provide a band sawing machine wherein the pulleys supporting the saw rotate yabout vertical aXes .a.nd wherein thefsaw is adjustable horizontally'and laterally,

provide a. bandsawing machine having an automatic cont-rol whereby the saw may be caused to move toward 4and from the work and whereby lateral adjustment ofthe saw 35 toward the work maybe effected.

An additional object of the invention isV to provide a band saw whichmay be moved laterally toward' the work, thus allowing the work to remain stationary Ywhile Ythe saw mov-es toward it to perform the sawing action. Y

A further obj ect of the invention is to provide a. band sawing machine,ihaving alSaw movable toward and from the work -together i5 with means for adjusting the saw so that a Siep by step ladvance' of thesawing blade,

maybe effected, `t'oeinible cuts of uniform thickness to be made. Further objects of y apparent yfrom .the following; description taken vin connectionwith the accompanying drawings wherein Fig. l 4is afside elevation of a band sawing'machine embodying the 'feat es of my inventio11;Fig.2 is afront aa elvatiifr Gf the band sawing; ilnaohleglg.

i in elevationshowing the ratche so constructed that the'Y band saw and itsV A further Q-generelle'invention is 'to the invention will be a ijs' @detail of the iqckiagimeanjs; Fig-4 'is a cross section partly vin elevation of a Vmodification of` my invention; Fig. 5 slan end l. viewwof 'amodificatio11;fl3`ig. 6 isa topplan view of the modification; Fig. .7 .is

an elevation s howingd'etails ofthe ,reversing j mechanism; Sis a sectional detail partly berechnen; Fig. 9 isa .sectional detail O fA the 'holding member; Fig. l0 {is la wiring diagr'fain, and Fig. l1 is aL section on line lle-ll, Fig. 4.

Referring to the dr,alwingby reference characters, lI I have shown a cutting block l() having supporting flegs thereon.

though in' the following 'descriptioinl describe my invention '1n connection with l'a nieatjcuttlng machine I wish it to be 1 1n- Clerstood that this 'is merely' typical Iof one of the manyuses to 'which my inventionmay be put and I do .notfwish to be limited-to this use only. l

The means v for supporting iny improved machine is .shown at 12. This means com-- prises a. bracket having u'pwarjdly'and downwardly extendingarms 1 4 and l5. A, pair of these bracketsare used which vare spaced apartand, as shown, .areoonnectedbyftrans- I verse bars 16. `Suitable faetening1neans `l7` may serve to hold'the bracletllpon.Lthecutting'block.'v 'i i f Adjacent y show a cuplS and uponeac'h 5af'rm'flfi ]fshovv collar 19. A. pair of itubular uprights l' the lower end of I i or standardsl are ys`howi' 1;. e ach havingonefend arranged within the v,cups'l Yand passing through the collars 1 9. The "standard 2O may be pemanently vsecured vvithin" the cup `18 if desired, butI prefer that it be *easilyl removed, ,to facilitate moving the machine from one working'benclr to another. l

Each of the stand 'Vds 20 isprovided with a movable collar or support 121 thereon. These collars or supports have a. sliding engagement with .the upright-s v2O and prefer` ably are provided .with anti-friction mem# bersV to all'ovi7 them .to move Vreadily The upward movementv of the-[Collar '2l yma'ybelimited by a stop "25- while 'the do"w'nvvard v'mo'vein nt may be limited the collar v19"'on thebracket 14. y r l Each .ofthemembers 21 is shownaspiro'- vided with a horizontallyr lextendingtrackway 30. A s shownji'each track comprises a p air of cylindricalv members horizontally arlae'efl all@ lIl Spad parallelrelaton; "The tracks are shown as connected by a rod 31 while the upper extremities of the standards counterweight is provided with a band 41 vother end engages a staple 44 shown asv the ends 41 of which loosely encircles the standards 20. The counterweight 41 is provided at its upper end with a loop 42 to which one end of a` cable 43 may be secured. The cable passes over the pulley 34 and the mounted on the rrod 31 which connects the tracks 30. The band 41 so proportioned that as the counterweight rises and the support 21 moves down, the two will not interfere in passing.

Mounted -upon the track 30, I's'how a platform 46. This platform is provided, at each end, with a pair of stirrups 47 having rolt ers 48 associated therewith to enable the platform to move upon the track. Adjacent each end of the platform 46 I show a shaft 50 and mounted upon the lower end of the shaft I show pulleys 51. Each of these pulleys 51 preferablyv comprises a member having three steps 52,` 53, andl 54. The step 53 is the one which is engaged by the saw, which is preferably of the usual band saw type. The saw is shown at 55 and it will be noted that the tee-th 56 thereof project over the step 54. A retaining disc 57 may be pro-V vided on each drum 51 to act as a safety member in case the "saw s'lips from aA pulley.

In order. to drive the band saw, I show a motor mounted on the platform 46. The motoris provided with a shaft 61 havinga pulley 62 thereon. A belt 63 passes over the pulley 62 and engages a .pulley 64 shown as mounted upon one of the shafts 50.

The counterweight 40 is' of such weight as to just balance the weight of the tracks 30and the mechanism on them so that the saw may be very easily moved vertically to ward and from the work. In order to more the saw I show the platform 46 provided withan extension on which I arrange a handle member 71. Adjacent the handled member 71 I show a switch 72 for controlling the operation of the motor 60. The switch 72 is provided!v with an operating member 73 which is arranged adjacent the handle 71.

In order'to hold the saw in various ad justinents I show the bar 30 as provided with plurality of notches 74 while upon oneV `of the stirrups 47 adjacent the handle 71 'I show a spring pressed locking Ydog75 which is adapted to engage the teeth74 upon the track 30. TheV locking dog 75 is provided with anf operating portion 76 which allowsv adjustment of the saw.

In operating my device material to be E .Sawed is j'laced u non.y the table 10 and the saw moved along the track until it is in the desired position. The operating handle 71 is then grasped and jthe platform is then lowered toward the article at the same time the operating handle 73 is moved to. start the motor and' cause the saw to function.

Referring to the modification of my invention shown in Figs. 4 to 10 I show at A, a supporting block having spaced brackets B secured thereto. Secured upon the bracket B, I show a pair ofvtrack members 77 which are affixed in a boss 7 8 upon the bracket. Mounted upon the track 77 -I show a platformm78 which is provided with pairs of guide members 80 secured to the track so that the platform can be moved 'back4 and forth upon the track. At each end of the platform vI provide a Vcylindrical bushing or guide 81 through which a screw 82 extends. rIChe screw is mounted for vertical move ment inthe tube 81 and through the center of the screw I show a passage 83. Extending through the passage Y83. I show a shaft 84.

The'shaft is provided with 'suitable` bearing 'members 85. The lower bearing 85 is mounted in the lower end of the screw 82 While the upper bearing 85 is mounted in a closure cap 86 shown as removably secured to the platform 78. I

' A collar y87 is provided upon the shaft-84 and a cap member 88 servesto secure the collar against movement relative to the screw 82. lVith'inthe cap 86 Ishow a. nut90 `which engages the'screw 82. In order to provide .means for rotating the nut 90 its outer surface is cut to form avworm wheel 91 which is adapt-ed to engage a worm 92 driven from the shaft 93. Arranged upon the platform 78 I show a motor 95 having a drive shaft ex# v,tendingfreinboth sides thereofas at 96 and Y97. The drive shaft 96A is provided with a gear 98 which engages a gear 99 on the shaft 93.

From the foregoing description it lwill be apparent that when the motor is operated the shaft 96 will drive the shaftv 93 which in turn will rotate the` nut 90 and thus cause the screw 82 to raise yor lower with ythe shaft 94.

In order to drive the shaft 84 while it is being raised or lowered or while it is stationary lY show the/shaft provided with keyway 100 which engages a Ykey 101 mounted on a sprocket 10.2.which is adapted to be driven by the chain 103 passing over the gear 104 mounted on the shaft97. From this description it. will be obvious that when the motor V95V turns the shaft 97 the chain 103 will drive the sprocket 102 and consequently rotate the shaft 84. It will accordingly be obviousv that lthe shaft 84 will be rotated by the motor and at the same time this shaft will move each of these pulleys a bandasafw 111 operates.

Ift is desirable tlifat ythis band saw Ebe made to rotate and at -the same time tomev-e rrp is reversable by means of a switch member :q

115.V The switch member Y1.15 has three con tact points 116, 117, 118. A switch closer is shown at20. This closer is pivoted at 121 to the switch member 115 and the cony struction is such that when the switch is in the position shown in Fig. 7 with the con# tact member 120 bridging the contacts 116 and 117 the motor will operate in one direction while when the c-ontact 120 is arranged and the cap 88 as provided with a slotted member 125. The slotted member is provided with a pair of adjustable stops 1,26 and 127 which are movable along the slotted member. The operating member 122 moves in the slotted member and when the screw 82 has moved down carrying the arm 125 with it, to a position so that the stop 126 engages the arm 120, the latter moves down until the contacts 117 and 118 are bridged and the motor is reversed. As the screw 82l moves upwardly the stop 127 engages the operating member 122 again rocking the arm 120 and bridging the contacts 116, 117 to again reverse the motor.

During all of this operation the pulley 110 is being rotated, thus driving the band saw. The cutting surface of the teeth of the band saw are arranged so that as the saw comes down these teeth perform their cutting operation.

The platform' 78 is adapted to be moved outwardly by means of compression springs In order to provide a 'step .by step mov-ement for this platform I show the rods 77 as provided with teeth 131 while upon the platform I'mount a pawl member 132. The pawl member is arranged on a pin 133 secured to the platform 78. rIhe ratchet includes a tube 135 which is mounted for verti cal. movement on the pin 133 being held in the position shown in Fig. 8 byA a spring 136.

' Then the pawl 132 is rocked about its pivot 136 the platform 78 moves out a distance depending on the size of the teeth in the rod 77.

In order to provide means to rock they platform movably mounted on said trackway f to move toward and from said support,

spaced shafts mounted on said platform,l

pulleys on said shafts, a band saw 'sup ported by said pulleys, saidv pulleys being mounted to rotate 'about vertical axes, and means to operate said band saw. i 2. In a' band sawing machine, a supporting member including a horizontal trackwayA projecting therefrom and movable vertically with 'the vtrackway remaining horizontal, a platform movably mounted on said trackway to move toward and from said member, a pair of pulleys on said platform, a band saw supported on said-pulleys and means to operate said band saw. Y 3. In ameat sawing machine, thecombination of a cutting block, a supporting member thereonA comprising a pair of spaced brackets, a horizontal track member supported by each of said brackets, said track members being movable vertically vwithout changing their horizontal position, a platform mounted on rollers on said track, a pair of shafts mounted on said platform pulleys carriedby'said'shafts, a saw engaging. said pulleys, a motor mounted on said plat-form and kadapted to drive one of said shafts` and means for adjusting the position of said platform onsaid track.. y

4. In a band sawing machine, a supporting member, said supporting member comprising a pair of arms having a cup at the lower end thereof and having a collar at the top theree of, a pairv of cylindrical rods having their ends fitted in said cups and extending through said collar, a slidingmember mount ed to slide vertically oneach of said rods, a horizontal track supported by leach of said sliding members, a platform mounted on Y vrollers on said track, a pair of, shafts' mounted on said platform, pulleys mounted on said shafts, a band saw engaging saidpulleys and means for driving said band saw.

5. In a meat sawing machine, the combi-` nation of a cutting block, a supporting member thereon, said supporting niembei'v coinprising a pair of arms having a cup at the loWei` end thereof and having a collar at the top thereof, a paii of cylindrical rods each having one end fitted'in one of said cups and extending through said collar, a sliding member mounted to slide vertically on each of said rods, a horizontal track supported by each ofsaidsliding members, a brace connecting said tracks, va pulley mounted on said rods,a counterWe-ight, a cable @enacting Said @Welterweight and 'Said ietf form and adapted to drive one of said shafts and means vfor adjusting the posit-ion of said platform on said track.

In testimony whereof, I hereunto affix my signature A i WILLIAM R; HARDEN. 

